Alvaro is co-author, with Robert Silverberg, of When The Blue Shift Comes and Traveler of Worlds: Conversations with Robert Silverberg.
Alvaro's more than thirty stories have appeared in magazines like Analog, Nature, Galaxy's Edge, Lackington's, Mothership Zeta, Farrago's Wainscot and Neon, as well as anthologies such as The Mammoth Book of the Adventures of Moriarty, The Mammoth Book of Jack the Ripper Tales, The 2015 Young Explorer's Adventure Guide, Cyber World, This Way to the End Times, Humanity 2.0 and An Alphabet of Embers.
Alvaro's essays, reviews and interviews have appeared in The Los Angeles Review of Books, The First Line, Asimov's, Tor.com, Strange Horizons, Clarkesworld, Foundation, The New York Review of Science Fiction and Intergalactic Medicine Show; he also edits the roundtable blog for Locus.